Control mechanism for pressing machines



Oct. 26, 1943.- o. H. PEARSON 2,332,830

CONTROL MECHANISM FOR PRESSING MACHINES FiledSept. 16, 1940 3 Sheets-Sheet 1 0 o a) 3mm 0f/a472aar'6 7 Oct. 26, 1943. o, H, PEAiQsoN 2,332,830

CONTROL MECHANISM FOR PRES-SING MACHINES Filed Sept. 16, 1940' 3 Sheets-Sheet 2 Oct. 26, 1943. o. H. PEARSON 2,332,830

CONTROL MECHANISM FOR PRESSING MACHINES Filed Sept. 16, 1940 3 Sheets-Sheet 3 MUTE grwc/wbom Jaw/m PatentedOct. 26, 1943 invention relates to. laundry presses and has for its object to provide a new and highly eri c'ientitwol hand controlled laundry .press which ispositive and surein its action, which look the gr'nofvable buck in th closed positionuntil'released anually orjautomatically"and which incorporat'esmany new. and improved features never before'foundinsuch types ofpresses. .7 1 ';ilfurther'- object s to provide a laundry press using. five like valves to "control the press, .two of which are used and must be used by the operator to "bring the movable head into contact with the stationary buck; tvvo of which areused .eithertogether or independently to release the movable head, and the other whichcontrolsrthe opera ng cylinder after the first two have been the" size of sonimay be largerthan others if operated by the'operator, allof the "valves being desired or required t" COI1t1Q1 the lipid pressure fior "operating the head.

A still further obiectis toprovide a new sysof controlling the movable head invvhich a tern two h and centrolsystemiscombinedwith a diav jphragm tojoperate an overe'center toggle operating the mastervalve and the press and to release the pressby operating the toggle in'theoppOSite direction by a idiaphragrnwith means in the path of travel of the toggle to holdit'from passing over center until the movable head has engaged the stationary buck orto approximatecontact "with the "buck depending upon the adjustment :Qitheleverage;

- 4 sun further object is to p o e a two hand ;cbntrolf or pressing machines which when actuated operate a diaphragm to shift a toggle,*to operate a master valve, close the movable head; .with'i the toggle held from" passing over dead penter'until the operating machine of the press as reached a predetermined positionat which timeja barrier is removed fromthe path of the togglefland the head i's'locked in closed position. A still further object is to provide a two hand controlled pressing machine having a single toggle to control the" master valve with a withdrawable barrier in the path of travel of the single toggle to prevent it passing over dead center until the barrier has been removed by pneumatic and mechanical means. 'j fnfstin further object is to'provide a device as set out'in the above objects n combination with all automatic release actuatedby and due to the wearer the padding on the press'and which will rider or other means which will release aconrelease the press by'the tilting-of the power e 1- 55 cbNmoL- MECHANISM Fen PRESSING "MACHINES :Otto l I LrPearSOn, Salt Lake City, Utah, assignor .to-L. N. Strike, Salt Lake City, Utah Application September 16, 1940, Serial No. 356,931 r 1; eclaims. (01. 192-131).

trol toggle by'theaction of the lever which controls the barrier again throwingthe toggle back to original position by the relative position of the lever and the relative position of the power cylinden. i

A still further object'isto provide an automatic time 'control,mechanism which will hold the" movable head in contact with'the stationary b'uck a predeterminedperiod of time and then by the how of mercury or fluid through a constricted orifice will release the movable head.

still further object'is to provide a control forpresses which when the' head engage the buck or near it 'it releases air from th manual valves and no pressure is in the lines or valves -du "tooperation-of master valve, thus eliminat engaging the pressing buck. Figure 7 is a diametrical ing the need'fof means to hold manual valves.

In the drawings,

Figure 1 is a diagrammatic verticalsection of a press, parts shown in-elevatiomshowing how my controls are mounted.

Figure 2 is a side elevation ofa small type press, parts shown cut away, to show the operating mechanism. 1 l

Figure 3 is a diametrical section of the master Valve. I i a Figure 4 is a diagrammatic view of the control system for the press showing th method of operating the toggle control for the master valve. Figure 5 is a side elevation of the automatic timer device.

Figure 6is a diagrammatic viewaof the con- '-trol system used with the timer for automaticah ly timing the periodior holding the movable head cury or fluid timer cylinder.

Figure 8 is a" diametrical section of the con- The cylinderF'is pivotedat one end by a pivot "4 and is provided with a piston 5 on'the end of a piston rodB. -The outer end of the rod 6 is attached to a leg lof a crank member 8 which in turn is attached to the toggle'E at the junc 'ture of the lower arm 9 and upper. arm II]. A 'set' of rollers H is mounted on the end of the "-roddadapted to roll up an inclined cam l2, the top of the cambeing arc-shaped at I3 with section of the me.r-

These consist of 7 spaced manual buttons l5 and I6 for actuating" the press and lesser spaced release buttons I1 and is. These buttons are set above pivoted levers L all of which are alike and occur under all of step of the larger diameter chamber to the smaller diameter chamber 33. This valve 45 has one end formed as a small stem 46 to engage the stem 43 and open the valve 4| from the seat 3! The opposite side of the valve 45 is formed as a guide stem 41 fitting into the bore of the plug 38. This larger stem is engaged by the rod 38.

A three section toggle T is mounted so that one arm 48 engages the ball 38a to actuate the valve assembly when shifted by the movement of the other two arms 49 and 50. The three arms are pivotally attached to each other and one end of v the arm. 48 is .pivotally attached to the plate 28 the finger tip control buttons. The case which 4 thereof. I brackets I!) attached to the underside of the table H and in alignment with each lever there is one of my control valves. These valves are alike in formand shape the only: difference being in their si zes and as they are all alike 'I Will describe the master valve which is also like these valves, hereafter in this application.

,These valves will for clarity be each given a different number and each performs its required function. The two outer valves or control valves 2i and 22 are attached in series. A pip v23 leads fluid or air pressure from a source of supply (not shown) into the first valve 2| and through :the ports of the valve when actuated by the finger of the operator through the pipe 24 to the next .valveZZ. From the valve 22 another pipe 25 leads to a tog le operating diaphragm 26. These two valves are so hooked up that when the valve 2| is pressed the pressure will pass through the valve to the next valve 22 but unless the second valve 22 is pressed the air stops there. If the second valve is depressed simultaneouslywith the first then the air actuates the diaphragm 2;6., operating the toggle lever 50 when the barrie is removed. This. is fully described-hereinafter. The air from the pipe line 23 also leads to the master valve V.. This valve is mounted through the flanged end of a mounting plate 28 secured onto the top side of the power cylindervF. The valve as shown inFigure 3 is made of a casing 29 having'a longitudinal bore thereth-rough having many diameters. A closure plug 2! isfitted into the end which is termed the pressure end in which the pipe line 23 is connected in the threaded hole 3'0: A chamber 32v is; formed inthis, end oif' -the cylinder by "a valve seat ,partitionS-l. The chamher on the other side of the valve partitionishown as chamber '33 is in open connection with ajp'ort 34 which leads through a'short nipple into the interior of the power cylinder. F.

The chamber 33 mergesinto aylarger 'diam- :ter'ed exhaust chamber 3'4'2fin'which :an exhaust -port 3t. is;'b'ored to discharge air-,from'theucylinder after'e'ach operation thereof; iIntheend of this i'c h'amber 734i there is raathreadedguide plug -31 through i which anactiiatingrod 38 is passed.

This r'od 38 carries i'a springheld ball 38ctwin' the y end thereof to tak'e'up wear oftlrevalves, The

valve in. the chamber "32 for; controlling the pressure from the sou-rce of power is providedwith an extended stem '39'fittingrinto arsocketsglfl in "the-plugtl'and the-valve t-i is of larger diameter than, the. stem and'norm'a-llyisheldseatedagainst vthe valve seat partition 3| by-aspringsfl. A stem '43 extends on the other side of the valve 4t into ,theicham'ber 33; Ihe other valve is of larger diameter z-andfitseagainst the seatjormed by the is attached to the plate 28 by a pivot 52 thus the central section'of the toggle is attached to this press i operated i d t the m l the other'two members but is free to move. The

The levers L are pivoted in suitable toggle arm 50 is mounted near the actuating arm "53 of the diaphragm 26 thus when the diaphragm is actuated the toggle is actuated.

A stop or barrier for thetoggle is provided to keep it from passing over dead center until desired 'and consists .oflajvertically' partially rotatably mounted rod crank 54 jmounted a cylinder base55 which attachesto the plate 28. A b'all'56 is carried in a recessinthe "base with one side ofthe ballextending to be engaged by the toggle arm 53and prevent it moving farther .until the crank rod 54has beenpartiallyrotated; .A recess is formed in the rod 54 into which the ball 55 recedes when the rod has been partially rotated withdrawing the ball sufi'iciently for the toggle to pass over, dead center; When this happens the pressing head is held in pressing .re-

lationship'with'thebuck until released by reverse action of the "toggle; 'Thisis accomplished pril'marily. by a .diaphragrn58 mounted on the 0p pos'ite side of th'ebpla'te 2'8 with the shaft 59 or the diaphragm adapted 'to press against "the centraljtoggle arm '49." 'A pipe Eflileadsto this diaphragm from a check 'Valve'coupling fif'whic'h is connected by two pipe's" '62 a'nd $3.1 Thepipe 62 leads to one release valve. 64 and the pipe 63 leads to 'tl'ierelea'se'valve 65. These are the two release valves controlled bythe finger controlled release 'buttonsfllfl and [Bland levers, L are mounted. behind and. under these buttons similar to the way the .otherlvalves are mounted to be actuated by the l'nit'tons"l5 and i6 and'the control levers 'When the release valves 164 and are operatedthe lair passing through pipes $3,1and 601ac tuate's thediaphrag'm 58 which in turn moves the toggl'e'T by the shaft 59Tpressing against the .lever 49.. Themov'ement of the toggle fr over center'caused by the pressure of the shaft .5 9, releases. the" valve V and thereby releasing the press. I V i s A pipe 51 connects the. valve 64 with the source of fluid pressure through a coupling on the top of the valve and thisfl-solirce of power is also ;co nr- 1ec.ted to the valve 65Iso. that both valves are provided with :air pressure or fluid pressure. Thus in the hook up; shown in Figure '4 the -.re-

lease valves may either one be utilized'ifor ire-- leasing the press but in Figure 6"thefvalve 65 is shown as for tandem purposes or in other words .to release the next in. av series of presses used in a semi-circle around the operator. a t

The rotatable crank rod54i has/the crankend thereof attached to the irarneworkby an adjustable link also that anyfl'movement orfoscillation or, the, power cylinder caused by the rollers .passing up the, incline. l2 will .change the relative position of the crank rodj54 which is the mean for permitting the toggle 'to :pass beyond dead center and the relative movement of the cylinder F controls the relative position of the crank rod. Should the padding become worn, so

that the press when operating comes down too far, the rollers ll passing over the are [3 will travel too far which reverses the action of the crank rod 54 causing the ball 56 tovengage the lever arm 50 of the toggle instantly releasing the press by forcing the toggle back beyond dead center to its initialposition exhausting the pressure from the cylinder .F by releasing the master valve V. p

The adjustment of the link 5411. and of the arm H] of the toggle E control the position when this action takes place.

Having thus described my invention, I desire to secure by Letters Patent and claim:

1. A control for power cylinders of laundry thereby; a master valve mounted to be actuated by said toggle to control the power cylinder to close the press and after the press has been actuated the valves are openand free from fluid To control the pressing head and automatically time the period for pressing I have provided a timer which shown in Figures 5 to 8, inclusive,

regulates to any predetermined period the time for holding the head engaged with the buck.

The timer consists of "an angle bracket 61a which is attached to the framework C of the pressure. v

2. A device as set out in claim 1 including means to release said press by spaced release valves either of which may be operated. and a machine and which bracket carries an extended L to the end of which a pressure diaphragm is mounted. This diaphragm 68 is connected to the diaphragm 26 by a pipe 1|. mounted to the base of the bracket 61a and care ries a piston 14 which piston is provided with ports 15 and vent control nut 16 with the head of the cylinder closed and a plug is screwed into the open end of the cylinder with the piston rod 11 passing through the plug to engage an actuating lever 18. The piston is filled with mercury or other suitable fluid and the time required for the fluid to pass through the ports controls the speed of drop of the piston. The end of the lever 18 is turned down and engaged by the rod of the diaphragm 68. The lever is pivoted at 19 for fulcrum pivot and pressure by the diaphragm raises the outer longer end of the lever raising the piston in the mercury. A spring 80 is mounted adjustaby to the end of the lever 18 with the tension of the spring pulling the end of the piston downwardly causing the piston to settle through the mercury as the tension of the spring pulls it and the speed of lowering of the outer A cylinder 13 is fluid means diaphragm to return the toggle to the initial position.

3. A device as set out in claim 1 including,

a lever connected to the power cylinder having a recess therein adapted to permit a barrier to fit into said recess to permit the toggle to move to its over center position when the power cylinder has been moved a predetermined distance by the operating mechanism of the press.

4. A control for the power cylinders of laundry presses comprising, a master valve mounted to direct air into said cylinder; means to connect with the cylinder to move a movable head toengage a stationary buck; a three armed pivotally-connected toggle mounted to have one arm thereof. engage and actuate the master valve; a diaphragm mounted adjacent said toggle to actuate the toggle and thereby the master valve; spaced manually controlled valves to be simultaneously engaged to actuate said diaphragm and thereby actuate the toggle, the master valve, and cylinder in turn, causing the movable head of the press to close to the stationary buck; and a diaphragm mounted adjacent said toggle toshift in the opposite direction to release the master valve and thereby the press.

5. A device as set out in claim 4 including,

' a lever mounted on the power cylinder with one end connected with the framework of the press;

end of the lever is governed by the tension of the spring and the size of the ports in the piston. A valve BI is mounted to the bracket 61 and the stem 82 of the valve 83 is engaged by an adjustable bolt 84 mounted through the lever 18 when it reaches a predeterminedposition and the position is adjusted by the predetermined time required or desired for holding the press closed. The valve may be of a type such as;

shown in Figure 3 or may be as shown in Figure 8 with a ball valve 85 held to its seat 86 by a spring 81. The stem 82 of the valve 83 passes out through the plug 88 and the seat 89 of the ball valve is so made that when the valve is pressed away from the seat pressure will pass from one side to the other. A pipe 90 is connected in the port 9| in the master valve V by removing the plug 92 and inserting the end of the pipe into the threaded end of the port, and l the pipe leads into the lower chamber 93 of the valve 8|. The chamber above the valve seat is a then connected through the check valve to the diaphragm 58 by a pipe 94.

and a barrier ball controlled by said lever said ball to be directly in the path of the toggle when the toggle has first been operated but to be withdrawn from the path of travel when the cylinderhas been moved to a predetermined position.

6. A control for presses comprising, spaced manually controlled valves; a master valve; a

diaphragm operated by the spaced manually controlled valves and connected with toggle means to operate said master valve, said manual valves having no pressure therein after the master valve has been actuated.

'7. A device as set out in claim 1 including, means to release said press by spaced manual release valves either of which may be operated and fluid means to return the toggle to the initial postion.

8. A device as set out in claim 6 including,

an automatic fluid timer to release the press after a predetermined period.

OTTO H. PEARSON. 

